Method for regenerating biogas dehydration drying agent by utilizing low enthalpy energy

Abstract

The invention relates to a method for regenerating a biogas dehydration drying agent by utilizing a low enthalpy energy. A plurality of tower plates are arranged in a drying tower; a hot water pipe is arranged below the outer edge of each tower plate; a biogas outlet is formed at the upper part of a tower body; a biogas inlet is formed at the lower part of the tower body; a water steam outlet is formed at the top part of the tower body; drying agents are positioned on the tower plates in the drying tower; and the low enthalpy energy is used for supplying heat energy. As the method in the invention is used, the low enthalpy energy is organically associated with the regeneration of the biogas dehydration drying agent, so that the energy consumption is low; the comprehensive diversification utilization of the energy is realized; and the biogas dehydration drying agent is high in regeneration speed and long in service life. In addition, the biogas dehydration and the regeneration of the drying agent can be carried out simultaneously, so that the utilization efficiency and the production efficiency of resources are improved.

Description

technical field [0001] The invention relates to a method for regenerating a biogas dehydration desiccant with a low-enthalpy energy source. Background technique [0002] The main components of biogas are methane, carbon dioxide, hydrogen sulfide, moisture, and a small amount of other gas components. Biogas is obtained by anaerobic fermentation of organic matter and is a renewable energy source. With the continuous improvement of biogas production and processing technology, its huge economic and social benefits are gradually showing. If biogas is comprehensively utilized and developed as an energy product, large-scale production must be achieved, and it must be purified, compressed, separated, and canned to compete with other energy sources in the energy commodity market. The biogas purification process mainly includes desulfurization (removal of hydrogen sulfide), decarbonization (removal of carbon dioxide), and dehydration (removal of water vapor contained in biogas). ...

AI Technical Summary

Problems solved by technology

Among them, lithium oxide has a large water absorption capacity, but when it absorbs water, it releases a large amount of heat, which affects the cooling capacity and is corrosive; molecular sieve has low dehydration capacity, and the adsorption capacity of alumina is only 50% of that of silica gel.

Silica gel has good adsorption value performance, economical and practical, but after absorbing a large amount of water, it is easy to break, the regeneration temperature is high, the time is long, and the use is limited; the composite desiccant has good hygroscopicity, is unstable, and is easy to deliquesce; High consumption and long time

In order to reduce the cost of desiccant regeneration, the problems of large desorption energy consumption and large volume of drying and dehumidification equipment must be solved as soon as possible. The applicant hereby proposes a technical solution for using low-enthalpy energy as a heat source for biogas dehydration desiccant regeneration

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